Front legs have 5 taloned fingers (pentadactyl) that can hold things
like human hands. Dragonets had 3, that came together like pinchers
for hunting of fish and the like, but were engineered to the more
appropriate grasping hand for eating of larger animals.

The front talons are retractable, but rear are not.

Dragons have short forelimbs which causes a lopsided gait when walking,
and when resting they're usually on their haunches sitting.

Back legs have 3 toes.

Tails

Dragonkin have forked tails which hold the sphincter.

They can hold their excreta for up to five days in the event of illness,
then go between to release themselves. If they can't after five
days, then their riders (or pets in the case of fire lizards) will need
to clean up after them.

The genitalia are concealed under a pouch
like covering of skin under the connection of tail and body, which is only
shown during mating.

Mating

A period of "proddiness" occurs before the female dragon
rises. The signs depend on the mated team, but can be irritability, mood
changes, affectionate, etc.

Golds and greens tend to deepen and brighten in hide color a day before
mating, and blood a kill on the feeding grounds. Though greens don't
always give such warning.

Greens rise about every six to eight sevendays. Fertile golds rise
less, breaking out of deep sleep to fly to the feeding pens to blood a
beast.

The rider urges her queen to not eat the meat, because that would weigh
her down. The purpose of the mating flight is to have the strongest and
fastest catch her, so she must be at her lightest but energized by the
blood.

Golds tend to be possessive over the male dragons chasing her, which
is why it's dangerous to have two Golds rise at the same time. They will
battle to the death. Greens do not seem to have this problem.

The clutch is laid after about three months, and on the sands for about
five sevendays.